package com.zls.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebFilter("/*")
public class CorsFilter implements Filter{

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		// TODO Auto-generated method stub
		HttpServletRequest req=(HttpServletRequest) request;
		HttpServletResponse resp=(HttpServletResponse) response;
		
		resp.setHeader("Access-Control-Allow-Origin", "*");
		
		resp.setHeader("Access-Control-Allow-Methods", "POST,GET,PUT,OPTIONS,DELETE");
		
		resp.setHeader("Access-Control-Allow-Age", "3600");
		
		resp.setHeader("Access-Control-Allow-Headers", "*");
		
		if(req.getMethod().equalsIgnoreCase("OPTIONS")) {
			resp.setStatus(200);
		}
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
